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If you've got crook joints you need to have an observatory, or put the 12"LX90/tripod on wheels if you have a flat run, or consider an equatorial mounted scope like the Celestron C11 on a CGEM. The ~60 pound lift will be a deterrent to observing.
Another option for those of us with failing joints is to put the ota on an Alt-Az mount (DM-6 or T-Rex) with an Argo Navis or Sky Commander. This is a push-to setup though so you lose motorised tracking.
Having an instrument which is at the limit of your ability to lift/carry is fatal to observing.
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